A series of pieces or “rings” were The other key aspect of a mechanical pump seal is how to maintain the seal. Why Continuous seal chamber venting on vertical pumps. Below, you will see a sequence of photos which will help us identify the seal assembly you have. 3 Fig. Double seals provide a level of safety/zero emissions compliance not possible with single seals. Please let me know your thoughts. (Fig.3 & 4) On both of the above set-ups, the installation of a suitable device is required to seal the fluid contained in the casing. Replacing these mechanical seals involves opening the pump system, removing the impeller from the pump's shaft and sliding the old seal off the shaft. Every other leak path within the mechanical seal is blocked with the use off a gasket, o-ring, wedge (Rubber, PTFE or Flexible Graphite). The biggest advantage of split seals is that the pump motor does not need to be completely disassembled to get to the seal, reducing installation and maintenance time and labor. In some cases, we are not able to directly cross reference a seal in our cross reference to pump manufacturers. Where Vertical pumps. Expellers can also be more cost-effective than mechanical seals and, since repairing mechanical seals can cost up to 60% of the installation, price is a factor for many. Setting Innovative Standards M PUMPS PROCESS SRL Via dell’artigianato, 120 45015 Corbola (RO) – Italia Tel. b) Slide rotary unit on shaft sleeve and set the back of the rotary unit on the second scribe line as determined in step 8. Seal flush from pump discharge and recirculation to pump suction with orifices. Mechanical split seals are designed for relatively low-duty pumps used in many industries for aqueous applications where the process fluid being sealed would not be considered hazardous. • Mechanical seals were originally designed to lend a greater sealing capability than could be achieved using common packing. Springs (single or multiple), a metal bellows or just compressed elastomers are used to provide the needed energy to keep pressing the seal faces together. In order to assure you receive the correct seal for your pump, it is very important that you supply us with accurate information. The liquid film Clean, non-polymerizing fluids at moderate temperatures. Because mechanical shaft seal failures are the number one cause of pump downtime, the writer decided to dedicate this column to mechanical seal basics. Increase seal chamber pressure and fluid vapor margin. THE FUNDAMENTALS 2 ALPHA ALPHA Fig. In some pumps, even if the mechanical seal setting plates are engaged can be turned for preliminary alignment however some of them are quite difficult to turn so I suppose it is a good idea to did-engage it before any turning of the shaft is done. This is essential when pumping or mixing a dangerous or toxic substance. +39 0426 346304 Fax + 39 0426 349126 [email protected] PUMP MECHANICAL SEAL Centrifugal, Horizontal, Lined CL SEAL-M series User Manual This copy of the manual is a translation of the italian version A mechanical seal positioned just behind the spinning impeller on the motor shaft prevents water from entering the delicate electrical motor of the pump. These seals virtually eliminate leakage of the fluid or gas being handled in pumps or mixers. Seal chamber heat removal. Set screw the rotary unit to the shaft sleeve (if seal is supplied with holding clips, remove at this time). 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